Reliable ultra-narrow step pitch board-to-board connector

Abstract

The reliable ultra-narrow-step board-to-board connector provided by the invention comprises the male end connector and the female end connector, and the signal terminals of the outer-layer signal terminal group and the signal terminals of the inner-layer signal terminal group are reversely arranged in a staggered manner, so that the problem of soldering tin adhesion of ultra-narrow-step pins can be solved; when the male-end connector is connected with the female-end connector, the male-end power supply terminal is connected with the female-end power supply terminal, and the male-end signal terminal is connected with the female-end signal terminal. The first female end plastic body is provided with a second plastic retaining wall for transversely limiting the female end signal terminal, so that transverse displacement of the male end signal terminal and the female end signal terminal can be avoided, and the problem of short circuit of adjacent signal terminals caused by deviation of the male end signal terminal and the female end signal terminal due to external force when the male end and the female seat are buckled for use is prevented. And the use reliability of the connector is improved.

Description

Technical Field

[0001] The invention relates to the technical field of connectors, and in particular to a reliable ultra-narrow pitch board-to-board connector. Background Art

[0002] As an indispensable part of electronic products, board-to-board connectors have fast and stable transmission functions and the characteristics of low loss and high fidelity, and play a bridge of communication in electronic circuits. The development of 4G and 5G has accelerated the iteration speed of products in the consumer electronics industry. The multifunctional modules and high-speed development of smartphones and wearable devices have promoted the development of board-to-board connectors. Displays, touch screens, antenna connections, battery connections, microphone connections, cameras and other modules all require board-to-board connections. Therefore, in smart devices, there are relatively high requirements for the miniaturization, stability and reliability of board-to-board connectors.

[0003] At present, the mainstream in the market is still 0.35mm and 0.30mm pitch board-to-board connectors. In recent years, brands have begun to launch and mass-produce 0.175mm pitch board-to-board connectors, which have also been used in a certain mobile phone brand. The existing 0.175mm pitch board-to-board connectors have quality risks. Since the distance between adjacent Pins is too small, adjacent Pins are prone to solder adhesion problems. After the male and female connectors are fastened, the male head is slightly displaced by external force, which may cause short circuits with adjacent Pins, resulting in insufficient reliability. Summary of the invention

[0004] The problem to be solved by the present invention is to provide a reliable ultra-narrow pitch board-to-board connector, which avoids the problem of short circuit with adjacent signal terminals caused by deviation of the male head and the female socket due to external force when they are engaged and used.

[0005] To solve the above technical problems, a reliable ultra-narrow pitch board-to-board connector is provided according to the present invention, comprising a male connector and a female connector, wherein the male connector comprises two male power terminals, a first male outer signal terminal group, a first male inner signal terminal group, a second male outer signal terminal group, a second male inner signal terminal group, and a male plastic body, wherein the first male outer signal terminal group, the first male inner signal terminal group, the second male outer signal terminal group, and the second male inner signal terminal group all comprise a plurality of male signal terminals arranged in parallel, The male signal terminals of the first male outer signal terminal group are reversely staggered with the male signal terminals of the first male inner signal terminal group, and the male signal terminals of the second male outer signal terminal group are reversely staggered with the male signal terminals of the second male inner signal terminal group. The male plastic body is integrally formed on the male signal terminal and the male power terminal, and the male plastic body is provided with a first plastic retaining wall which plays a lateral limiting role for the male signal terminal; the female connector includes two female power terminals, the first female outer signal terminal group, the first female inner signal terminal group, and the second female inner signal terminal group. The first female terminal outer layer signal terminal group, the second female terminal inner layer signal terminal group, the two first female terminal plastic bodies, the two second female terminal plastic bodies, the first female terminal outer layer signal terminal group, the first female terminal inner layer signal terminal group, the second female terminal outer layer signal terminal group, and the second female terminal inner layer signal terminal group all include a plurality of female terminal signal terminals arranged in parallel, the female terminal signal terminals of the first female terminal outer layer signal terminal group and the female terminal signal terminals of the first female terminal inner layer signal terminal group are reversely staggered, and the female terminal signal terminals of the second female terminal outer layer signal terminal group and the female terminal signal terminals of the second female terminal inner layer signal terminal group are reversely staggered. The female signal terminals of the signal terminal group are arranged in reverse staggered arrangement, wherein one of the first female plastic bodies is integrally formed on the female signal terminals of the first female outer signal terminal group and the first female inner signal terminal group, and the other first female plastic body is integrally formed on the female signal terminals of the second female outer signal terminal group and the second female inner signal terminal group, and the second female plastic body is integrally formed on the female power terminal and between one ends of the two first female plastic bodies, and the first female plastic body is provided with a second plastic retaining wall which plays a lateral limiting role on the female signal terminal.

[0006] Preferably, the male signal terminal includes an arched contact portion, a first pin portion connected to one end of the arched contact portion, and a first plastic retaining wall is formed on both side surfaces of the arched contact portion; the female signal terminal includes a U-shaped contact portion, an arched bending portion connected to one end of the U-shaped contact portion, a second pin portion connected to one end of the arched bending portion, and an elastic contact portion connected to the other end of the U-shaped contact portion, and a second plastic retaining wall is formed on both side surfaces of the arched bending portion.

[0007] Preferably, the female connector also includes two metal armors, which are integrally molded on the second female plastic body. A mating groove matching the male power terminal is arranged on the top of the metal armor. The female power terminal includes two contact springs. Spring windows are opened on the two side walls of the mating groove. The contact springs extend into the mating groove through the spring windows. A contact bulge is arranged on one side wall of the mating groove. A positioning island is arranged at the bottom of the mating groove. A positioning notch matching the positioning island is arranged on the top of the male power terminal. The male power terminal includes two side pins and one end pin. The side pins and the end pins are both bent to form a sealing groove. The male plastic body is molded on the sealing groove, and a flow hole is opened on the end pin.

[0008] Preferably, a limiting groove is provided on the outer side wall of the arched contact portion, and a protrusion is provided on the inner side wall of the U-shaped contact portion.

[0009] Preferably, a third plastic retaining wall is provided on the first female end plastic body for longitudinally limiting the U-shaped contact portion.

[0010] Preferably, a plurality of first slots are arranged on one end wall of the male power terminal, the male plastic body is molded on the first slots, a second slot is arranged on the side wall of the metal armor, and the second female plastic body is molded on the second slots.

[0011] Preferably, the other end of the arched contact portion extends to the bottom surface of the male end plastic body.

[0012] The beneficial effects of the present invention are as follows: the present invention provides a reliable ultra-narrow pitch board-to-board connector, which can solve the problem of solder adhesion of ultra-narrow pitch pins by arranging the signal terminals of the outer signal terminal group and the signal terminals of the inner signal terminal group in reverse and staggered manner; when the male connector and the female connector are connected, the male power terminal and the female power terminal are connected, and the male signal terminal and the female signal terminal are connected. Since a first plastic retaining wall that plays a lateral limiting role for the male signal terminal is arranged on the male plastic body, and a second plastic retaining wall that plays a lateral limiting role for the female signal terminal is arranged on the first female plastic body, lateral displacement of the male signal terminal and the female signal terminal can be avoided, and the problem of short circuit with adjacent signal terminals caused by deviation due to external force when the male head and the female seat are engaged and used can be prevented, thereby improving the reliability of the connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The schematic structural diagram of the male connector of the present invention is illustrated.

[0014] Figure 2 A top view of the male connector of the present invention is illustrated.

[0015] Figure 3 The schematic diagram of the exploded structure of the male connector of the present invention is illustrated.

[0016] Figure 4 Illustrate the present invention Figure 1 Schematic diagram of the partially enlarged structure of part A in the middle.

[0017] Figure 5 Illustrate the present invention Figure 3 Schematic diagram of the partial enlarged structure of part B in the middle.

[0018] Figure 6 Illustrate the present invention Figure 3 Schematic diagram of the partial enlarged structure of part C in the middle.

[0019] Figure 7 The structural schematic diagram of the female connector of the present invention is illustrated.

[0020] Figure 8 A top view of the female connector of the present invention is illustrated.

[0021] Fig. 9 The schematic diagram of the exploded structure of the female connector of the present invention is illustrated.

[0022] Fig.10 Illustrate the present invention Figure 7 Schematic diagram of the partial enlarged structure of part D in the middle.

[0023] Fig.11 Illustrate the present invention Fig. 9 Schematic diagram of the partial enlarged structure of part E in the middle.

[0024] Fig.12 Illustrate the present invention Fig. 9 Schematic diagram of the partial enlarged structure of part F in the middle.

[0025] Fig.13 The schematic diagram of the assembly structure of the male connector and the female connector of the present invention is illustrated.

[0026] Fig.14 Illustrate the present invention Fig.13 Cross-sectional view at GG′.

[0027] Fig.15 Illustrate the present invention Fig.13 Cross-sectional view at point HH′.

[0028] Fig.16 Illustrate the present invention Fig.13 Cross-sectional view at II′.

[0029] Description of the accompanying drawings: male connector 1, male power terminal 10, positioning notch 100, side pin 101, end pin 102, flow hole 102a, sealing groove 103, first slot 104, first male outer layer signal terminal group 11, male signal terminal 110, arched contact portion 111, limiting groove 111a, first pin portion 112, first male inner layer signal terminal group 12, second male outer layer signal terminal group 13, second male inner layer signal terminal group 14, male plastic body 15, first plastic retaining wall 150, female connector 2, female power terminal 20, contact spring 20 0, first female end outer layer signal terminal group 21, female end signal terminal 210, U-shaped contact portion 211, raised portion 211a, arched bending portion 212, second pin portion 213, elastic contact portion 214, first female end inner layer signal terminal group 22, second female end outer layer signal terminal group 23, second female end inner layer signal terminal group 24, first female end plastic body 25, second plastic retaining wall 250, third plastic retaining wall 251, second female end plastic body 26, metal armor 27, fitting groove 270, spring sheet window 270a, contact convex bump 270b, positioning island 270c, second slot 270d. DETAILED DESCRIPTION

[0030] To make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments.

[0031] Based on the described embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present disclosure.

[0032] refer to Figure 1-Figure 16 .

[0033] The present invention provides a reliable ultra-narrow pitch board-to-board connector, comprising a male connector 1 and a female connector 2. The male connector 1 comprises two male power terminals 10, a first male outer layer signal terminal group 11, a first male inner layer signal terminal group 12, a second male outer layer signal terminal group 13, a second male inner layer signal terminal group 14, and a male plastic body 15. The first male outer layer signal terminal group 11, the first male inner layer signal terminal group 12, the second male outer layer signal terminal group 13, and the second male inner layer signal terminal group 14 all comprise a plurality of male signal terminals 110 arranged in parallel. The male signal terminals 110 of the first male outer layer signal terminal group 11 are connected to the female connector 2. The terminal 110 is arranged in reverse offset with the male terminal signal terminal 110 of the first male terminal inner layer signal terminal group 12, and the male terminal signal terminal 110 of the second male terminal outer layer signal terminal group 13 is arranged in reverse offset with the male terminal signal terminal 110 of the second male terminal inner layer signal terminal group 14. The male terminal plastic body 15 is integrally formed on the male terminal signal terminal 110 and the male terminal power terminal 10, and the male terminal plastic body 15 is provided with a first plastic retaining wall 150 which plays a lateral limit role for the male terminal signal terminal 110; the female terminal connector 2 includes two female terminal power terminals 20, a first female terminal outer layer signal terminal group 21, a first female terminal inner layer signal terminal group 22, and a second female terminal The outer layer signal terminal group 23, the second female end inner layer signal terminal group 24, two first female end plastic bodies 25, two second female end plastic bodies 26, the first female end outer layer signal terminal group 21, the first female end inner layer signal terminal group 22, the second female end outer layer signal terminal group 23, and the second female end inner layer signal terminal group 24 all include a plurality of female end signal terminals 210 arranged in parallel, the female end signal terminals 210 of the first female end outer layer signal terminal group 21 and the female end signal terminals 210 of the first female end inner layer signal terminal group 22 are reversely staggered, and the female end signal terminals 210 of the second female end outer layer signal terminal group 23 and the second female end inner layer signal terminal group 2 4, the female signal terminals 210 are reversely staggered, one of the first female plastic bodies 25 is integrally formed on the female signal terminals 210 of the first female outer signal terminal group 21 and the first female inner signal terminal group 22, the other first female plastic body 25 is integrally formed on the female signal terminals 210 of the second female outer signal terminal group 23 and the second female inner signal terminal group 24, the second female plastic body 26 is integrally formed on the female power terminal 20 and between one ends of the two first female plastic bodies 25, and the first female plastic body 25 is provided with a second plastic retaining wall 250 that plays a role of lateral limiting the female signal terminal 210.

[0034] Its working principle is that the signal terminals of the outer signal terminal group and the signal terminals of the inner signal terminal group are arranged in reverse and staggered arrangement, so as to solve the problem of solder adhesion of ultra-narrow pitch pins; when the male connector 1 and the female connector 2 are connected, the male power terminal 10 and the female power terminal 20 are connected, and the male signal terminal 110 and the female signal terminal 210 are connected. Since the male plastic body 15 is provided with a first plastic retaining wall 150 which plays a lateral limiting role for the male signal terminal 110, and the first female plastic body 25 is provided with a second plastic retaining wall 250 which plays a lateral limiting role for the female signal terminal 210, the male signal terminal 110 and the female signal terminal 210 can be prevented from lateral displacement, and the problem of short circuit with adjacent signal terminals caused by deviation due to external force when the male head and the female socket are engaged and used can be prevented, thereby improving the reliability of the connector.

[0035] Based on the above embodiment, the male signal terminal 110 includes an arched contact portion 111, a first pin portion 112 connected to one end of the arched contact portion 111, and a first plastic retaining wall 150 is formed on both side surfaces of the arched contact portion 111; the female signal terminal 210 includes a U-shaped contact portion 211, an arched bending portion 212 connected to one end of the U-shaped contact portion 211, a second pin portion 213 connected to one end of the arched bending portion 212, and an elastic contact portion 214 connected to the other end of the U-shaped contact portion 211, and a second plastic retaining wall 250 is formed on both side surfaces of the arched bending portion 212. When the male connector 1 and the female connector 2 are connected, the arched contact portion 111 is inserted into the inner side of the U-shaped contact portion 211, and the elastic contact portion 214 abuts against the outer wall of the arched contact portion 111, thereby realizing an effective connection between the male signal terminal 110 and the female signal terminal 210. The first plastic retaining wall 150 and the second plastic retaining wall 250 respectively play a lateral limiting role on the arched contact portion 111 and the arched bending portion 212, thereby preventing the male signal terminal 110 and the female signal terminal 210 from being displaced by external force, thereby avoiding the problem of short circuit between adjacent signal terminals.

[0036] Based on the above embodiment, the female connector 2 further includes two metal armors 27, which are integrally formed on the second female plastic body 26. The top of the metal armor 27 is provided with an engaging groove 270 matching the male power terminal 10. The female power terminal 20 includes two contact springs 200, and spring windows 270a are provided on the two side walls of the engaging groove 270. The contact springs 200 extend into the engaging groove 270 through the spring windows 270a. A contact bulge 270b is provided, a positioning island 270c is provided at the bottom of the engaging groove 270, a positioning notch 100 matching the positioning island 270c is provided at the top of the male power terminal 10, the male power terminal 10 comprises two side pins 101 and an end pin 102, the side pin 101 and the end pin 102 are both bent to form a sealing groove 103, the male plastic body 15 is molded on the sealing groove 103, and a flow hole 102a is opened on the end pin 102. When the male connector 1 and the female connector 2 are connected, the male power terminal 10 will be embedded in the embedding groove 270, the positioning notch 100 will be fitted on the positioning island 270c, the two contact springs 200 will abut against the two side surfaces of the male power terminal 10 respectively, and the contact convex bump 270b will abut against one end surface of the male power terminal 10, so that the male connector 1 and the female connector 2 are stably assembled, and the male power terminal 10 and the female power terminal 20 can be stably connected. When the male plastic body 15 is injection molded, the plastic material can fill the sealing groove 103 on the end face pin 102 through the flow hole 102a to ensure that the cavity is filled and bubbles are avoided. By molding the plastic material at the sealing groove 103, the side pin 101 and the end face pin 102 can be prevented from creeping tin during soldering.

[0037] Based on the above embodiment, a limiting groove 111a is provided on the outer wall of the arched contact portion 111, and a protrusion 211a is provided on the inner wall of the U-shaped contact portion 211. When the male connector 1 and the female connector 2 are connected, the protrusion 211a will be stuck on the limiting groove 111a, which can improve the snapping force between the male signal terminal 110 and the female signal terminal 210 and improve the connection stability.

[0038] Based on the above embodiment, a third plastic retaining wall 251 is provided on the first female plastic body 25 to longitudinally limit the U-shaped contact portion 211, thereby preventing the U-shaped contact portion 211 from being lifted when the male and female connectors are plugged in and out, thereby avoiding deformation of the female signal terminal 210.

[0039] Based on the above embodiment, a plurality of first slots 104 are provided on one end wall of the male power terminal 10, the male plastic body 15 is molded on the first slots 104, a second slot 270d is provided on the side wall of the metal armor 27, and the second female plastic body 26 is molded on the second slot 201, which can improve the bonding strength between the male plastic body 15 and the male power terminal 10 to prevent the male plastic body 15 and the male power terminal 10 from loosening, improve the bonding strength between the metal armor 27 and the second female plastic body 26 to prevent the metal armor 27 and the second female plastic body 26 from loosening.

[0040] Based on the above embodiment, the other end of the arched contact portion 111 extends to the bottom surface of the male plastic body 15 to play a supporting role and enhance the structural strength of the male plastic body 15 .

[0041] The above implementation modes are merely descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineering and technical personnel in the field shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A reliable ultra-narrow pitch board-to-board connector, comprising a male connector and a female connector, characterized in that: The male connector comprises two male power terminals, a first male outer signal terminal group, a first male inner signal terminal group, a second male outer signal terminal group, a second male inner signal terminal group, and a male plastic body. The first male outer signal terminal group, the first male inner signal terminal group, the second male outer signal terminal group, and the second male inner signal terminal group all comprise a plurality of male signal terminals arranged in parallel. The male signal terminals of the first male outer signal terminal group are reversely offset from the male signal terminals of the first male inner signal terminal group. The male signal terminals of the second male outer signal terminal group are reversely staggered with the male signal terminals of the second male inner signal terminal group, the male plastic body is integrally formed on the male signal terminals and the male power terminals, and the male plastic body is provided with a first plastic retaining wall which plays a lateral limiting role for the male signal terminals; the female connector comprises two female power terminals, a first female outer signal terminal group, a first female inner signal terminal group, a second female outer signal terminal group, a second female inner signal terminal group, two The first female end plastic body and the second female end plastic bodies are each provided with a plurality of female end signal terminals arranged in parallel. The female end signal terminals of the first female end outer layer signal terminal group and the female end signal terminals of the first female end inner layer signal terminal group are arranged in reverse staggered arrangement. The female end signal terminals of the second female end outer layer signal terminal group and the female end signal terminals of the second female end inner layer signal terminal group are arranged in reverse staggered arrangement. The first female-end plastic body is integrally formed on the female-end signal terminals of the first female-end outer signal terminal group and the first female-end inner signal terminal group, the other first female-end plastic body is integrally formed on the female-end signal terminals of the second female-end outer signal terminal group and the second female-end inner signal terminal group, the second female-end plastic body is integrally formed on the female-end power terminal and between one ends of the two first female-end plastic bodies, and the first female-end plastic body is provided with a second plastic retaining wall which plays a role of lateral limiting the female-end signal terminal.

2. A reliable ultra-narrow pitch board-to-board connector according to claim 1, characterized in that: The male signal terminal includes an arched contact portion, a first pin portion connected to one end of the arched contact portion, and the first plastic retaining wall is formed on both side surfaces of the arched contact portion; the female signal terminal includes a U-shaped contact portion, an arched bending portion connected to one end of the U-shaped contact portion, a second pin portion connected to one end of the arched bending portion, and an elastic contact portion connected to the other end of the U-shaped contact portion, and the second plastic retaining wall is formed on both side surfaces of the arched bending portion.

3. A reliable ultra-narrow pitch board-to-board connector according to claim 2, characterized in that: The female connector also includes two metal armors, which are integrally formed on the second female plastic body. A mating groove matching the male power terminal is arranged on the top of the metal armor. The female power terminal includes two contact springs. Spring windows are provided on the two side walls of the mating groove. The contact springs extend into the mating groove through the spring windows. A contact bulge is provided on one side wall of the mating groove. A positioning island is provided at the bottom of the mating groove. A positioning notch matching the positioning island is provided on the top of the male power terminal. The male power terminal includes two side pins and one end pin. The side pin and the end pin are both bent to form a sealing groove. The male plastic body is molded on the sealing groove, and a flow hole is provided on the end pin.

4. A reliable ultra-narrow pitch board-to-board connector according to claim 3, characterized in that: A limiting groove is arranged on the outer side wall of the arched contact portion, and a protrusion is arranged on the inner side wall of the U-shaped contact portion.

5. A reliable ultra-narrow pitch board-to-board connector according to claim 4, characterized in that: The first female end plastic body is provided with a third plastic retaining wall which plays a role of longitudinally limiting the U-shaped contact portion.

6. A reliable ultra-narrow pitch board-to-board connector according to claim 5, characterized in that: A plurality of first slots are arranged on one end wall of the male power terminal, the male plastic body is molded on the first slots, a second slot is arranged on the side wall of the metal armor, and the second female plastic body is molded on the second slots.

7. A reliable ultra-narrow pitch board-to-board connector according to claim 6, characterized in that: The other end of the arched contact portion extends to the bottom surface of the male end plastic body.

Images